<b>Guidance from the Hadith:</b><br> 1) It urges us to convey knowledge and not conceal it.<br> 2) If a person refrains from giving knowledge to those who deserve it or answering questions from those who need his answer, he will be punished with a bridle of fire being put on his mouth. What a severe threat to those who conceal the knowledge they possess from those who deserve to learn it!<br> <br> <b>Benefit:</b><br> This threat does not apply to everyone who conceals knowledge. Indeed, some sorts of knowledge should be concealed from some people and conveyed to others. A certain matter may cause some harm to certain people if they are informed of it; that is why it should not be conveyed to them. This rule is indicated in the Prophet’s life and guidance. In the "Chapter on those who convey knowledge to certain people and exclude others lest they may not be able to understand", Al-Bukhāri included a Hadith in which Mu‘ādh ibn Jabal (may Allah be pleased with him) reported that the Prophet (may Allah’s peace and blessings be upon him) said to him: “No one testifies that there is no god but Allah and that Muhammad is the Messenger of Allah, sincerely from his heart, except that Allah will forbid him for Hellfire.” He said: “O Messenger of Allah, shall I inform people about this so that they may rejoice?” He replied: “Then they would rely upon it.” In another version: “No, I fear they would rely upon it.”<br> So, not conveying some knowledge when Fitnah (trial or temptation) or confusion is feared does not fall under the prohibited concealment of knowledge. Rather, it is preservation of knowledge. In Arabic poetic verses, the erudite scholar Hāfizh Hakami says (what means):<br> Beware of concealing knowledge,<br> for he who conceals it is cursed by Allah and all people.<br> But concealing knowledge from those who are not worthy of it<br> is not actually concealment, but preservation of knowledge.<br> Concealment is to hide it from true seekers of knowledge.<br> You ought to grasp this and not get confused!